Linear Combination of Vectors
A linear combination of two or more vectors is the vector obtained by adding two or more vectors (with different directions) which are multiplied by scalar values.
Examples
Write the vector 
= (1, 2, 3) as a linear combination of the vectors: 
= (1, 0, 1), 
= (1, 1, 0) and 
= (0, 1, 1).
